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Finding the Fourth Proportional to 136.25, 204.12 and 67.69

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Solution

The fourth proportional to 136.25, 204.12 and 67.69 is: 101.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.25 : 204.12 = 67.69 : x
  2. Step 2: Convert to fraction form
    136.25/204.12 = 67.69/x
  3. Step 3: Cross multiply
    136.25x = 204.12 × 67.69
  4. Step 4: Simplify right side
    136.25x = 13,816.88
  5. Step 5: Solve for x
    x = 13,816.88/136.25
  6. Step 6: Final answer
    x = 101.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.